Blind-slat adjuster



(No Model.)

9. L. WILLIAMS.

BLIND SLAT ADJUSTER.

Patented June 15, 1886.

2:5 wlialma u. PETERS. Phuln-Lrihcriphnr. Washington, 04 c.

ATENT OFFICE.

GEORGE L. WILLIAMS, OF EDWABDSVILLE, ILLINOIS.

BLlND-SLAT ADJUSTER.

SPECIFICATION forming part of Letters Patent No. 343,881, dated n 1 1Application filed September 17, 1885. Serial No. 177,361. (No model.)

To all whom it may concern.-

Be it known that I, GEORGE L. WILLIAMS, of Edwardsville, Illinois, havemade a new and useful Improvement in Blind-Slat Locks, of whichthefollowing is a full, clear, and exact description. I

The improvement relates to that class of blind-slat locks in which thelock is connected with the bar that operates the slats.

The annexed drawings, making part of this specification, exhibit a blindhaving the improvement.

Figure 1 is a view in perspective, showing the lower portion of theblind. Fig. 2 is a detail, being a view in front elevation of that partof the device immediately associated-with the staple; and Fig. 3 is aview in side elevation, showing a modification of. the spring.

The same letters denote the same parts.

A, Fig. 1, represents a Venetian blind of the customary form. A rod, B,at its upper end is pivoted to the slat-bar O, and thence extendsdownward through a staple, D, which is inserted in the lower rail, a, ofthe blind. The rod B is provided with a handle, I), or suitably shapedto enable it to be grasped and moved upward and downward through thestaple, and the slats E E thereby moved, and when the slats have beenadjusted, either opened or closed, or at any intermediate point, as maybe desired, they are locked by causing the rod B to be pressed againstsome part of the staple with sufficient force to keep the rod fromslipping. This may be done by means of a spring, G, attached to the rodand adaptedto bear upon the rail a, as indicated in Fig. 3. I prefer,however, a spring such as shown at F, Figs. 1, 2, which is fixed in therail a, and whose free end orpartf is adapted to bear against the rodand press it against the staple. To enable the rod. to be moreeffectually locked, it is notched or serrated or made with a series ofprojections, into or between which the staple-bar d fits when the rod ispressed against the staple. The lock is rendered still more efficient byso constructing the rod and spring that they shall interfit as well asthe rod and the staple, to which end the rod at its inner side isnotched, serrated, or furnished with projections between which the barfof the spring fits. All these points are attained by making the rod B inthe form of a corrugated rod and shaping the staple as shown, so thatwhile the staple-bar is bearing in one of the corrugations, b, thespring-barf 55 is bearing in an adjacent corrugation, b in the oppositeface of the rod, substantially as shown.

In adjust-ing the lock the operator presses the rod B back wardsufficiently to be detached from the staple, and then moves it up ordown, as may be desired, and as soon as the pressure upon the rod isreleased the spring acts to lock the rod. The staple can be variouslymodified from the shape shown, provided it has a shoulder against whichthe rod can be pressed by the spring, as described.

The parts D F B are in effect a new article of manufacture, constitutinga device that can be applied to blinds already in use.

I claim-' In combination with the slats and slat-bar of a Venetianblind, the rod B, having the series of indentations 1) b the staple D,and the spring F, as described.

GEO. WILLIAMS.

